| Grayslake to Cibolo (Texas) | 1,048.64 mi (1,687.62 km) |
| Grayslake to Cicero (Illinois) | 37.05 mi (59.62 km) |
| Grayslake to Cimarron Hills (Colorado) | 905.09 mi (1,456.59 km) |
| Grayslake to Cincinnati (Ohio) | 287.98 mi (463.46 km) |
| Grayslake to Cinco Ranch (Texas) | 970.74 mi (1,562.26 km) |
| Grayslake to Circleville (Ohio) | 326.22 mi (525.00 km) |
| Grayslake to Citrus (California) | 1,706.68 mi (2,746.63 km) |
| Grayslake to Citrus Heights (California) | 1,753.39 mi (2,821.81 km) |
| Grayslake to Citrus Park (Florida) | 1,032.43 mi (1,661.54 km) |
| Grayslake to Claiborne (Louisiana) | 714.53 mi (1,149.93 km) |
| Grayslake to Claremont (California) | 1,697.60 mi (2,732.02 km) |
| Grayslake to Claremont (New Hampshire) | 797.05 mi (1,282.72 km) |
| Grayslake to Claremore (Oklahoma) | 580.29 mi (933.88 km) |
| Grayslake to Clarksburg (Maryland) | 602.54 mi (969.69 km) |
| Grayslake to Clarksburg (West Virginia) | 454.84 mi (732.00 km) |
